Ubuntu 16.04 is the previous LTS release available to download. This tutorial has download links to DVD ISO Images of Ubuntu 16.04 LTS release. You can find the Ubuntu 16.04 release announced on its official website. To download the latest stable release visit here.
Ubuntu 16.04 LTS Download Links
Please find below DVD ISO images download links for Ubuntu Desktop and Ubuntu server edition. You can also use torrent to download images.